v1.0.0-dev.1

• Changed License from MIT to Apache 2.0
• Breaking: Refactored the SDK to use own models instead of returning the underlaying Protobuf objects
• Most of the functionality added to achieve a stable release:
  • Authentication (Session refresh, missing drivers, linking and unlinking)
  • Leaderboard
  • Friends & Groups
  • Notifications
  • Tournaments
  • Matches